Paypal的IPN示例

资料来源：网络整理时间：2023/2/14 0:20:36 共计：3593 浏览

即时付款通知——示范代码

包括几个流行的网站开发环境的示范代码。尽管此代码已经过PayPal测试，但PayPal无法对其用途负责。


ASP.Net/C#	Java/JSP
ASP.Net/VB	PERL
ASP/VBScript	PHP
ColdFusion

ASP.Net/C#

using System;

using System.IO;

using System.Text;

using System.Net;

using System.Web;



public partial class csIPNexample :System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

//Post back to either sandbox or live

string strSandbox =
"https://www.sandbox.paypal.com/cgi-bin/webscr";

string strLive = "https://www.paypal.com/cgi-bin/webscr";

HttpWebRequest req =
(HttpWebRequest)WebRequest.Create(strSandbox);



// Set values for the request back

req.Method = "POST";

req.ContentType = "application/x-www-form-urlencoded";

byte[] param =
Request.BinaryRead(HttpContext.Current.Request.ContentLength);

string strRequest = Encoding.ASCII.GetString(param);

strRequest += "&cmd=_notify-validate";

req.ContentLength = strRequest.Length;



//for proxy

//WebProxy proxy = new WebProxy(new Uri("http://url:port#"));

//req.Proxy = proxy;



//Send the request to PayPal and get the response

StreamWriter streamOut = new StreamWriter(req.GetRequestStream(),
System.Text.Encoding.ASCII);

streamOut.Write(strRequest);

streamOut.Close();

StreamReader streamIn = new
StreamReader(req.GetResponse().GetResponseStream());

string strResponse = streamIn.ReadToEnd();

streamIn.Close();



if (strResponse == "VERIFIED")

{

// check the payment_status is Completed

// check that txn_id has not been previously processed

// check that receiver_email is your Primary PayPal email

// check that payment_amount/payment_currency are correct

// process payment

}

else if (strResponse == "INVALID")

{

// log for manual investigation

}

else

{

//log response/ipn data for manual investigation

}

}

}

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ASP.Net/VB

Imports System.Net

Imports System.IO



Partial Class vbIPNexample

Inherits System.Web.UI.Page



Protected Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Load

'Post back to either sandbox or live

Dim strSandbox As String =
"https://www.sandbox.paypal.com/cgi-bin/webscr"

Dim strLive As String =
"https://www.paypal.com/cgi-bin/webscr"

Dim req As HttpWebRequest = CType(WebRequest.Create(strSandbox),
HttpWebRequest)



'Set values for the request back

req.Method = "POST"

req.ContentType = "application/x-www-form-urlencoded"

Dim Param() As Byte =
Request.BinaryRead(HttpContext.Current.Request.ContentLength)

Dim strRequest As String = Encoding.ASCII.GetString(Param)

strRequest = strRequest +
"&cmd=_notify-validate"

req.ContentLength = strRequest.Length



'for proxy

'Dim proxy As New WebProxy(New
System.Uri("http://url:port#"))

'req.Proxy = proxy



'Send the request to PayPal and get the response

Dim streamOut As StreamWriter = New
StreamWriter(req.GetRequestStream(), Encoding.ASCII)

streamOut.Write(strRequest)

streamOut.Close()

Dim streamIn As StreamReader = New
StreamReader(req.GetResponse().GetResponseStream())

Dim strResponse As String = streamIn.ReadToEnd()

streamIn.Close()



If strResponse = "VERIFIED" Then

'check the payment_status is Completed

'check that txn_id has not been previously processed

'check that receiver_email is your Primary PayPal email

'check that payment_amount/payment_currency are correct

'处理付款

ElseIf strResponse = "INVALID" Then

'log for manual investigation

Else

'Response wasn't VERIFIED or INVALID, log for manual
investigation

End If

End Sub

End Class

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ASP/VBScript

(requires MSXML)

<%@LANGUAGE="VBScript"%>

<%

Dim Item_name, Item_number, Payment_status, Payment_amount

Dim Txn_id, Receiver_email, Payer_email

Dim objHttp, str



' read post from PayPal system and add 'cmd'

str = Request.Form &
"&cmd=_notify-validate"



' post back to PayPal system to validate

set objHttp = Server.CreateObject("Msxml2.ServerXMLHTTP")

' set objHttp =
Server.CreateObject("Msxml2.ServerXMLHTTP.4.0")

' set objHttp = Server.CreateObject("Microsoft.XMLHTTP")

objHttp.open "POST", "https://www.paypal.com/cgi-bin/webscr",
false

objHttp.setRequestHeader "Content-type",
"application/x-www-form-urlencoded"

objHttp.Send str



' assign posted variables to local variables

Item_name = Request.Form("item_name")

Item_number = Request.Form("item_number")

Payment_status = Request.Form("payment_status")

Payment_amount = Request.Form("mc_gross")

Payment_currency = Request.Form("mc_currency")

Txn_id = Request.Form("txn_id")

Receiver_email = Request.Form("receiver_email")

Payer_email = Request.Form("payer_email")



' Check notification validation

if (objHttp.status <> 200 )
then

' HTTP error handling

elseif (objHttp.responseText = "VERIFIED") then

' check that Payment_status=Completed

' check that Txn_id has not been previously processed

' check that Receiver_email is your Primary PayPal email

' check that Payment_amount/Payment_currency are correct

' process payment

elseif (objHttp.responseText = "INVALID") then

' log for manual investigation

else

' error

end if

set objHttp = nothing

%>

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ColdFusion



<!-- read post from PayPal system and add 'cmd'
-->

<CFSET
str="cmd=_notify-validate">

<CFLOOP INDEX="TheField"
list="#Form.FieldNames#">

<CFSET str = str &
"&#LCase(TheField)#=#URLEncodedFormat(Form[TheField])#">

</CFLOOP>

<CFIF
IsDefined("FORM.payment_date")>

<CFSET str = str &
"&payment_date=#URLEncodedFormat(Form.payment_date)#">

</CFIF>

<CFIF
IsDefined("FORM.subscr_date")>

<CFSET str = str &
"&subscr_date=#URLEncodedFormat(Form.subscr_date)#">

</CFIF>

<CFIF
IsDefined("FORM.auction_closing_date")>

<CFSET str = str &
"&subscr_date=#URLEncodedFormat(Form.auction_closing_date)#">

</CFIF>

<!-- post back to PayPal system to validate
-->

<CFHTTP
URL="https://www.paypal.com/cgi-bin/webscr?#str#" METHOD="GET"
RESOLVEURL="false">

</CFHTTP>

<!-- assign posted variables to local variables
-->

<CFSET
item_name=FORM.item_name>

<CFSET
payment_status=FORM.payment_status>

<CFSET
payment_amount=FORM.mc_gross>

<CFSET
payment_currency=FORM.mc_currency>

<CFSET txn_id=FORM.txn_id>

<CFSET
receiver_email=FORM.receiver_email>

<CFSET
payer_email=FORM.payer_email>

<CFIF
IsDefined("FORM.item_number")>

<CFSET
item_number=FORM.item_number>

</CFIF>

<!-- check notification validation
-->

<CFIF #CFHTTP.FileContent# is
"VERIFIED">

<!-- check that payment_status=Completed
-->

<!-- check that txn_id has not been previously
processed -->

<!-- check that receiver_email is your Primary
PayPal email -->

<!-- check that payment_amount/payment_currency are
correct -->

<!-- process payment -->

<CFELSEIF #CFHTTP.FileContent# is
"INVALID">

<!-- log for investigation -->

<CFELSE>

<!-- error -->

</CFIF>

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Java/JSP

<%@ page import="java.util.*"
%>

<%@ page import="java.net.*" %>

<%@ page import="java.io.*" %>



<%

// read post from PayPal system and add 'cmd'

Enumeration en = request.getParameterNames();

String str = "cmd=_notify-validate";

while(en.hasMoreElements()){

String paramName = (String)en.nextElement();

String paramValue = request.getParameter(paramName);

str = str + "&" + paramName + "=" +
URLEncoder.encode(paramValue);

}



// post back to PayPal system to validate

// NOTE: change http: to https: in the following URL to verify
using SSL (for increased security).

// using HTTPS requires either Java 1.4 or greater, or Java Secure
Socket Extension (JSSE)

// and configured for older versions.

URL u = new URL("https://www.paypal.com/cgi-bin/webscr");

URLConnection uc = u.openConnection();

uc.setDoOutput(true);

uc.setRequestProperty("Content-Type","application/x-www-form-urlencoded");

PrintWriter pw = new PrintWriter(uc.getOutputStream());

pw.println(str);

pw.close();



BufferedReader in = new BufferedReader(

new InputStreamReader(uc.getInputStream()));

String res = in.readLine();

in.close();



// assign posted variables to local variables

String itemName = request.getParameter("item_name");

String itemNumber = request.getParameter("item_number");

String paymentStatus =
request.getParameter("payment_status");

String paymentAmount = request.getParameter("mc_gross");

String paymentCurrency = request.getParameter("mc_currency");

String txnId = request.getParameter("txn_id");

String receiverEmail =
request.getParameter("receiver_email");

String payerEmail = request.getParameter("payer_email");



check notification validation

if(res.equals("VERIFIED")) {

// check that paymentStatus=Completed

// check that txnId has not been previously processed

// check that receiverEmail is your Primary PayPal email

// check that paymentAmount/paymentCurrency are correct

// process payment

}

else if(res.equals("INVALID")) {

// log for investigation

}

else {

// error

}

%>

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PERL

(requires LWP::UserAgent)



#!/usr/bin/perl



# read post from PayPal system and add 'cmd'

read (STDIN, $query, $ENV{'CONTENT_LENGTH'});

$query .= '&cmd=_notify-validate';



# post back to PayPal system to validate

use LWP::UserAgent;

$ua = new LWP::UserAgent;

$req = new HTTP::Request
'POST','https://www.paypal.com/cgi-bin/webscr';

$req->content_type('application/x-www-form-urlencoded');

$req->content($query);

$res = $ua->request($req);



# split posted variables into pairs

@pairs = split(/&/, $query);

$count = 0;

foreach $pair (@pairs) {

($name, $value) = split(/=/, $pair);

$value =~ tr/+/ /;

$value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C", hex($1))/eg;

$variable{$name} = $value;

$count++;

}



# assign posted variables to local variables

$item_name = $variable{'item_name'};

$item_number = $variable{'item_number'};

$payment_status = $variable{'payment_status'};

$payment_amount = $variable{'mc_gross'};

$payment_currency = $variable{'mc_currency'};

$txn_id = $variable{'txn_id'};

$receiver_email = $variable{'receiver_email'};

$payer_email = $variable{'payer_email'};



if ($res->is_error) {

# HTTP error

}

elsif ($res->content eq 'VERIFIED') {

# check the $payment_status=Completed

# check that $txn_id has not been previously processed

# check that $receiver_email is your Primary PayPal email

# check that $payment_amount/$payment_currency are correct

# process payment

}

elsif ($res->content eq 'INVALID') {

# log for manual investigation

}

else {

# error

}

print "content-type: text/plain\n\n";

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PHP 4.1

// read the post from PayPal system and add 'cmd'

$req = 'cmd=_notify-validate';



foreach ($_POST as $key => $value) {

$value = urlencode(stripslashes($value));

$req .= "&$key=$value";

}



// post back to PayPal system to validate

$header .= "POST /cgi-bin/webscr HTTP/1.0\r\n";

$header .= "Content-Type:
application/x-www-form-urlencoded\r\n";

$header .= "Content-Length: " . strlen($req) . "\r\n\r\n";

$fp = fsockopen ('ssl://www.paypal.com', 443, $errno, $errstr,
30);



// assign posted variables to local variables

$item_name = $_POST['item_name'];

$item_number = $_POST['item_number'];

$payment_status = $_POST['payment_status'];

$payment_amount = $_POST['mc_gross'];

$payment_currency = $_POST['mc_currency'];

$txn_id = $_POST['txn_id'];

$receiver_email = $_POST['receiver_email'];

$payer_email = $_POST['payer_email'];



if (!$fp) {

// HTTP ERROR

else {

fputs ($fp, $header . $req);

while (!feof($fp)) {

$res = fgets ($fp, 1024);

if (strcmp ($res, "VERIFIED") == 0) {

// check the payment_status is Completed

// check that txn_id has not been previously processed

// check that receiver_email is your Primary PayPal email

// check that payment_amount/payment_currency are correct

// process payment

}

else if (strcmp ($res, "INVALID") == 0) {

// log for manual investigation

}

}

fclose ($fp);

}

?>

https://cms.paypal.com/cgi-bin/marketingweb?cmd=_render-content&content_ID=developer/library_code_ipn_code_samples

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